
W83977TF
2.2.6数据速率寄存器( DR寄存器)(写入基地址+ 4 ) ....................... 34
2.2.7 FIFO寄存器(R / W基地址+ 5 ) .................................... ...................................... 36
2.2.8数字输入寄存器( DI寄存器) (读基址+ 7 ) .................... 38
2.2.9配置控制寄存器( CC寄存器)
(WRITE基地址+ 7)...................................................................................................39
3. UART PORT............................................................................................................................ 40
3.1
3.2
通用异步接收/发送器( UART A, UART B) .................. 40
注册ADDRESS..............................................................................................................................40
3.2.1 UART控制寄存器( UCR ) (读/写) .................................... ....................... 40
3.2.2 UART状态寄存器( USR ) (读/写) .................................... ........................... 42
3.2.3交换控制寄存器( HCR ) (读/写) .................................... ........ 43
3.2.4握手状态寄存器( HSR ) (读/写) .................................... ............. 44
3.2.5 UART FIFO控制寄存器( UFR ) (只写) .................................... ............. 45
3.2.6中断状态寄存器( ISR ) (只读) ..................................... .................. 46
3.2.7中断控制寄存器( ICR ) (读/写) .................................... ............. 47
3.2.8可编程的波特率发生器( BLL / BHL ) (读/写) ............................. 47
3.2.9用户定义寄存器( UDR ) (读/写) ................................... .......................... 48
4.红外(IR)端口......................................................................................................... 49
5.并行端口............................................................................................................... 49
5.1
5.2
打印机接口逻辑...............................................................................................................49
增强型并行端口(EPP)..................................................................................................50
5.2.1数据交换技术..........................................................................................................................51
5.2.2打印机状态BUFFER.......................................................................................................51
5.2.3打印机控制锁存器和打印机控制交换技术............................... 52
5.2.4 EPP地址PORT...................................................................................................................52
5.2.5 EPP数据端口0-3....................................................................................................................53
并口EPP 5.2.6位映射寄存器....................................... ................ 53
5.2.7 EPP引脚说明............................................................................................................54
5.2.8 EPP操作..........................................................................................................................54
5.3
扩展功能并行( ECP )端口........................................... .......................... 55
5.3.1 ECP寄存器和模式定义.......................................... ................................. 55
5.3.2数据和ECPAFIFO PORT....................................................................................................56
5.3.3设备状态寄存器( DSR ) ......................................... ................................................ 56
5.3.4设备控制寄存器( DCR ) ......................................... ........................................... 57
- II -
出版日期: 1998年3月
修订版0.62